530 lines
14 KiB
PHP
530 lines
14 KiB
PHP
<?php
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namespace App\Classes;
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use Illuminate\Support\Collection;
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use Illuminate\Support\Facades\Log;
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use App\Classes\File\{Receive,Send};
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use App\Classes\Protocol\{Binkp,DNS,EMSI,Zmodem};
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use App\Classes\Sock\Exception\SocketException;
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use App\Classes\Sock\SocketClient;
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use App\Models\{Address,Mailer,Setup,System,SystemLog};
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// @todo after receiving a mail packet/file, dont acknowledge it until we can validate that we can read it properly.
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abstract class Protocol
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{
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// Enable extra debugging
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protected const DEBUG = FALSE;
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private const LOGKEY = 'P--';
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/* CONSTS */
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// Return constants
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protected const OK = 0;
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protected const TIMEOUT = -2;
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protected const RCDO = -3;
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protected const ERROR = -5;
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protected const MAX_PATH = 1024;
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/* O_ options - [First 9 bits are protocol P_* (Interfaces/ZModem)] */
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/** 0000 0000 0000 0000 0010 0000 0000 BOTH - No file requests accepted by this system */
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protected const O_NRQ = 1<<9;
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/** 0000 0000 0000 0000 0100 0000 0000 BOTH - Hold file requests (not processed at this time). */
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protected const O_HRQ = 1<<10;
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/** 0000 0000 0000 0000 1000 0000 0000 - Filename conversion, transmitted files must be 8.3 */
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protected const O_FNC = 1<<11;
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/** 0000 0000 0000 0001 0000 0000 0000 - Supports other forms of compressed mail */
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protected const O_XMA = 1<<12;
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/** 0000 0000 0000 0010 0000 0000 0000 BOTH - Hold ALL files (Answering System) */
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protected const O_HAT = 1<<13;
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/** 0000 0000 0000 0100 0000 0000 0000 BOTH - Hold Mail traffic */
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protected const O_HXT = 1<<14;
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/** 0000 0000 0000 1000 0000 0000 0000 - No files pickup desired (Calling System) */
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protected const O_NPU = 1<<15;
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/** 0000 0000 0001 0000 0000 0000 0000 - Pickup files for primary address only */
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protected const O_PUP = 1<<16;
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/** 0000 0000 0010 0000 0000 0000 0000 EMSI - Pickup files for all presented addresses */
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protected const O_PUA = 1<<17;
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/** 0000 0000 0100 0000 0000 0000 0000 BINK - Node needs to be password validated */
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protected const O_PWD = 1<<18;
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/** 0000 0000 1000 0000 0000 0000 0000 BOTH - Node invalid password presented */
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protected const O_BAD = 1<<19;
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/** 0000 0001 0000 0000 0000 0000 0000 EMSI - Use RH1 for Hydra (files-after-freqs) */
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protected const O_RH1 = 1<<20;
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/** 0000 0010 0000 0000 0000 0000 0000 BOTH - Node is nodelisted */
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protected const O_LST = 1<<21;
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/** 0000 0100 0000 0000 0000 0000 0000 BOTH - Inbound session */
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protected const O_INB = 1<<22;
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/** 0000 1000 0000 0000 0000 0000 0000 BOTH - TCP session */
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protected const O_TCP = 1<<23;
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/** 0001 0000 0000 0000 0000 0000 0000 EMSI - Remote understands EMSI-II */
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protected const O_EII = 1<<24;
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/* Negotiation Options */
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/** 00 0000 I/They dont want a capability? */
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protected const O_NO = 0;
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/** 00 0001 - I want a capability, but can be persuaded */
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protected const O_WANT = 1<<0;
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/** 00 0010 - They want a capability and we want it too */
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protected const O_WE = 1<<1;
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/** 00 0100 - They want a capability */
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protected const O_THEY = 1<<2;
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/** 00 1000 - I want a capability, and wont compromise */
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protected const O_NEED = 1<<3;
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/** 01 0000 - Extra options set */
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protected const O_EXT = 1<<4;
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/** 10 0000 - We agree on a capability and we are set to use it */
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protected const O_YES = 1<<5;
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// Session Status
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public const S_OK = 0;
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protected const S_NODIAL = 1;
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protected const S_REDIAL = 2;
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protected const S_BUSY = 3;
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protected const S_FAILURE = 4;
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public const S_MASK = 7;
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protected const S_HOLDR = 8;
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protected const S_HOLDX = 16;
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protected const S_HOLDA = 32;
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protected const S_ADDTRY = 64;
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protected const S_ANYHOLD = (self::S_HOLDR|self::S_HOLDX|self::S_HOLDA);
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// File transfer status
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public const FOP_OK = 0;
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public const FOP_CONT = 1;
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public const FOP_SKIP = 2;
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public const FOP_ERROR = 3;
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public const FOP_SUSPEND = 4;
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public const FOP_GOT = 5;
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public const TCP_SPEED = 115200;
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protected SocketClient $client; /* Our socket details */
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protected Setup $setup; /* Our setup */
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protected Node $node; /* The node we are communicating with */
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/** The list of files we are sending */
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protected Send $send;
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/** The list of files we are receiving */
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protected Receive $recv;
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/** @var int The active options for a session */
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private int $options;
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/** @var int Tracks the session state */
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private int $session;
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/** @var array Our negotiated capability for a protocol session */
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protected array $capability; // @todo make private
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/** @var bool Are we originating a connection */
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protected bool $originate;
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/** @var bool Is the application down for maintenance */
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protected bool $down = FALSE;
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/** @var int Our mailer ID for logging purposes */
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private int $mailer_id;
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private array $comms;
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protected bool $force_queue = FALSE;
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abstract protected function protocol_init(): int;
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abstract protected function protocol_session(bool $force_queue=FALSE): int;
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/**
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* @param Setup $setup
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* @throws \Exception
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*/
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public function __construct(Setup $setup)
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{
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$this->setup = $setup;
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// Some initialisation details
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switch (get_class($this)) {
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case Binkp::class:
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$this->mailer_id = Mailer::where('name','BINKP')->sole()->id;
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break;
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case DNS::class:
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case Zmodem::class:
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break;
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case EMSI::class:
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$this->mailer_id = Mailer::where('name','EMSI')->sole()->id;
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break;
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default:
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throw new \Exception('not handled'.get_class($this));
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}
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}
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/**
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* @throws \Exception
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*/
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public function __get($key)
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{
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switch ($key) {
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case 'ls_SkipGuard': /* double-skip protection on/off */
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case 'rxOptions': /* Options from ZRINIT header */
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return $this->comms[$key] ?? 0;
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case 'ls_rxAttnStr':
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return $this->comms[$key] ?? '';
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default:
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throw new \Exception('Unknown key: '.$key);
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}
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}
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/**
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* @throws \Exception
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*/
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public function __set($key,$value)
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{
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switch ($key) {
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case 'ls_rxAttnStr':
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case 'ls_SkipGuard':
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case 'rxOptions':
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$this->comms[$key] = $value;
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break;
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case 'client':
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$this->{$key} = $value;
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break;
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default:
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throw new \Exception('Unknown key: '.$key);
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}
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}
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/* Capabilities are what we negotitate with the remote and are valid for the session */
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/**
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* Clear a capability bit
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*
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* @param int $cap (F_*)
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* @param int $val (O_*)
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* @return void
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*/
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public function capClear(int $cap,int $val): void
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{
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if (! array_key_exists($cap,$this->capability))
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$this->capability[$cap] = 0;
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$this->capability[$cap] &= ~$val;
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}
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/**
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* Get a session bit (SE_*)
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*
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* @param int $cap (F_*)
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* @param int $val (O_*)
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* @return bool
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*/
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protected function capGet(int $cap,int $val): bool
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{
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if (! array_key_exists($cap,$this->capability))
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$this->capability[$cap] = 0;
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if ($val === self::O_WE)
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return $this->capGet($cap,self::O_WANT) && $this->capGet($cap,self::O_THEY);
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return $this->capability[$cap] & $val;
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}
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/**
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* Set a session bit (SE_*)
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*
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* @param int $cap (F_*)
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* @param int $val (O_*)
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*/
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protected function capSet(int $cap,int $val): void
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{
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if (! array_key_exists($cap,$this->capability) || $val === 0)
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$this->capability[$cap] = 0;
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$this->capability[$cap] |= $val;
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}
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/**
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* We got an error, close anything we are have open
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*
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* @throws \Exception
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*/
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protected function error_close(): void
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{
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if ($this->send->fd)
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$this->send->close(FALSE,$this->node);
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if ($this->recv->fd)
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$this->recv->close();
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}
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/**
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* Incoming Protocol session
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*
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* @param SocketClient $client
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* @return int
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* @throws SocketException
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*/
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public function onConnect(SocketClient $client): int
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{
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$pid = pcntl_fork();
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if ($pid === -1)
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throw new SocketException(SocketException::CANT_ACCEPT,'Could not fork process');
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// If our parent returns a PID, we've forked
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if ($pid)
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Log::info(sprintf('%s:+ New connection from [%s], thread [%d] created',self::LOGKEY,$client->address_remote,$pid));
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// This is the new thread
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else {
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Log::withContext(['pid'=>getmypid()]);
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Log::debug(sprintf('%s:* Client session starting',self::LOGKEY));
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$this->session($client,(new Address));
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}
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return $pid;
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}
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/* O_* determine what features processing is availabile */
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/**
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* Clear an option bit (O_*)
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*
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* @param int $key
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* @return void
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*/
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protected function optionClear(int $key): void
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{
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$this->options &= ~$key;
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}
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/**
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* Get an option bit (O_*)
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*
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* @param int $key
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* @return int
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*/
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protected function optionGet(int $key): int
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{
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return ($this->options & $key);
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}
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/**
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* Set an option bit (O_*)
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*
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* @param int $key
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* @return void
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*/
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protected function optionSet(int $key): void
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{
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$this->options |= $key;
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}
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/**
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* Our addresses to send to the remote
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*
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* @return Collection
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* @throws \Exception
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*/
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protected function our_addresses(): Collection
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{
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if ($this->setup->optionGet(Setup::O_HIDEAKA,'options_options')) {
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$addresses = collect();
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foreach (($this->originate ? $this->node->aka_remote_authed : $this->node->aka_remote) as $ao)
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$addresses = $addresses->merge(our_address($ao->zone->domain));
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$addresses = $addresses->unique();
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Log::debug(sprintf('%s:- Presenting limited AKAs [%s]',self::LOGKEY,$addresses->pluck('ftn')->join(',')));
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} else {
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$addresses = our_address();
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Log::debug(sprintf('%s:- Presenting ALL our AKAs [%s]',self::LOGKEY,$addresses->pluck('ftn')->join(',')));
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}
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return $addresses;
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}
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/**
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* Setup a session with a remote client
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*
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* @param SocketClient $client Socket details of session
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* @param Address $o If we have an address, we originated a session to this Address
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* @return int
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* @throws \Exception
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*/
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public function session(SocketClient $client,Address $o): int
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{
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if ($o->exists)
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Log::withContext(['ftn'=>$o->ftn]);
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// This sessions options
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$this->options = 0;
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$this->session = 0;
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$this->capability = [];
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// Our files that we are sending/receive
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$this->send = new Send;
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$this->recv = new Receive;
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if ($o) {
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// The node we are communicating with
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$this->node = new Node;
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$this->originate = $o->exists;
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// If we are connecting to a node
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if ($o->exists) {
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Log::debug(sprintf('%s:+ Originating a connection to [%s]',self::LOGKEY,$o->ftn));
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$this->node->originate($o);
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} else {
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$this->optionSet(self::O_INB);
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}
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}
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// We are an IP node
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$this->client = $client;
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// @todo This appears to be a bug in laravel? Need to call app()->isDownForMaintenance() twice?
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app()->isDownForMaintenance();
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$this->down = app()->isDownForMaintenance();
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switch (get_class($this)) {
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case EMSI::class:
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Log::debug(sprintf('%s:- Starting EMSI',self::LOGKEY));
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$this->optionSet(self::O_TCP);
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$rc = $this->protocol_init();
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if ($rc < 0) {
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Log::error(sprintf('%s:! Unable to start EMSI [%d]',self::LOGKEY,$rc));
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return self::S_FAILURE;
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}
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$rc = $this->protocol_session($this->originate);
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break;
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case Binkp::class:
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Log::debug(sprintf('%s:- Starting BINKP',self::LOGKEY));
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$this->optionSet(self::O_TCP);
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$rc = $this->protocol_session($this->originate);
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break;
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case DNS::class:
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return $this->protocol_session();
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default:
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Log::error(sprintf('%s:! Unsupported session type [%s]',self::LOGKEY,get_class($this)));
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return self::S_FAILURE;
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}
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// @todo These flags determine when we connect to the remote.
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// If the remote indicated that they dont support file requests (NRQ) or temporarily hold them (HRQ)
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if (($this->node->optionGet(self::O_NRQ) && (! $this->setup->optionGet(EMSI::F_IGNORE_NRQ,'emsi_options'))) || $this->node->optionGet(self::O_HRQ))
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$rc |= self::S_HOLDR;
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if ($this->optionGet(self::O_HXT))
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$rc |= self::S_HOLDX;
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if ($this->optionGet(self::O_HAT))
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$rc |= self::S_HOLDA;
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Log::info(sprintf('%s:= Total: %s - %d:%02d:%02d online, (%d) %lu%s sent, (%d) %lu%s received - %s',
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self::LOGKEY,
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$this->node->address ? $this->node->address->ftn : 'Unknown',
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$this->node->session_time/3600,
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$this->node->session_time%3600/60,
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$this->node->session_time%60,
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$this->send->total_sent,$this->send->total_sent_bytes,'b',
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$this->recv->total_recv,$this->recv->total_recv_bytes,'b',
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(($rc & self::S_MASK) === self::S_OK) ? 'Successful' : 'Failed',
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));
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// Add unknown FTNs to the DB
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$so = ($this->node->aka_remote_authed->count())
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? $this->node->aka_remote_authed->first()->system
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: System::createUnknownSystem();
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if ($so && $so->exists) {
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foreach ($this->node->aka_other as $aka)
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// @todo For disabled zones, we shouldnt refuse to record the address
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// @todo If the system hasnt presented an address for a configured period (eg: 30 days) assume it no longer carries it
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if ((! Address::findFTN($aka)) && ($oo=Address::createFTN($aka,$so))) {
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$oo->validated = TRUE;
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$oo->save();
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}
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// Log session in DB
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$slo = new SystemLog;
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$slo->items_sent = $this->send->total_sent;
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$slo->items_sent_size = $this->send->total_sent_bytes;
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$slo->items_recv = $this->recv->total_recv;
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$slo->items_recv_size = $this->recv->total_recv_bytes;
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$slo->mailer_id = $this->mailer_id;
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$slo->sessiontime = $this->node->session_time;
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$slo->result = ($rc & self::S_MASK);
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$slo->originate = $this->originate;
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$so->logs()->save($slo);
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// If we are autohold, then remove that
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if ($so->autohold) {
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$so->autohold = FALSE;
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$so->save();
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}
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}
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return $rc;
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}
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/* SE_* flags determine our session processing status, at any point in time */
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/**
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* Clear a session bit (SE_*)
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*
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* @param int $key
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*/
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protected function sessionClear(int $key): void
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{
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$this->session &= ~$key;
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}
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/**
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* Get a session bit (SE_*)
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*
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* @param int $key
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* @return bool
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*/
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protected function sessionGet(int $key): bool
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{
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return ($this->session & $key);
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}
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/**
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* Set a session bit (SE_*)
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*
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* @param int $key
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*/
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protected function sessionSet(int $key): void
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{
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$this->session |= $key;
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}
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} |